#ifndef __GTKDCH__
#define __GTKDCH__

//-----------------------------------------------------------------------------
// constants
//-----------------------------------------------------------------------------

#ifndef MM_TEXT
#define MM_TEXT         0
#define MM_ISOTROPIC    1
#define MM_ANISOTROPIC  2
#define MM_LOMETRIC     3
#define MM_HIMETRIC     4
#define MM_TWIPS        5
#define MM_POINTS       6
#define MM_METRIC       7
#endif

//-----------------------------------------------------------------------------
// coordinates transformations
//-----------------------------------------------------------------------------

inline wxCoord wxDCBase::DeviceToLogicalX( wxCoord x ) const {
  return wxRound( ( x - m_deviceOriginX ) / m_scaleX ) * m_signX + m_logicalOriginX;
}
inline wxCoord wxDCBase::DeviceToLogicalY( wxCoord y ) const {
  return wxRound( ( y - m_deviceOriginY ) / m_scaleY ) * m_signY + m_logicalOriginY;
}
inline wxCoord wxDCBase::DeviceToLogicalXRel( wxCoord x ) const {
  return wxRound( x / m_scaleX );
}
inline wxCoord wxDCBase::DeviceToLogicalYRel( wxCoord y ) const {
  return wxRound( y / m_scaleY );
}
inline wxCoord wxDCBase::LogicalToDeviceX( wxCoord x ) const {
  return wxRound( ( x - m_logicalOriginX ) * m_scaleX ) * m_signX + m_deviceOriginX;
}
inline wxCoord wxDCBase::LogicalToDeviceY( wxCoord y ) const {
  return wxRound( ( y - m_logicalOriginY ) * m_scaleY ) * m_signY + m_deviceOriginY;
}
inline wxCoord wxDCBase::LogicalToDeviceXRel( wxCoord x ) const {
  return wxRound( x * m_scaleX );
}
inline wxCoord wxDCBase::LogicalToDeviceYRel( wxCoord y ) const {
  return wxRound( y * m_scaleY );
}

//-----------------------------------------------------------------------------
// wxDC
//-----------------------------------------------------------------------------

class wxDC : public wxDCBase {
  public:
    wxDC();
    virtual ~wxDC() { }

    #if wxUSE_PALETTE
    void SetColourMap( const wxPalette& palette ) { SetPalette( palette ); };
    #endif // wxUSE_PALETTE

    // Resolution in pixels per logical inch
    virtual wxSize GetPPI() const;

    virtual bool StartDoc( const wxString& ( message ) ) { return true; }
    virtual void EndDoc() { }
    virtual void StartPage() { }
    virtual void EndPage() { }

    virtual void SetMapMode( int mode );
    virtual void SetUserScale( double x, double y );
    virtual void SetLogicalScale( double x, double y );
    virtual void SetLogicalOrigin( wxCoord x, wxCoord y );
    virtual void SetDeviceOrigin( wxCoord x, wxCoord y );

    virtual void SetAxisOrientation( bool xLeftRight, bool yBottomUp );

    virtual void ComputeScaleAndOrigin();

    virtual GdkWindow* GetGDKWindow() const { return NULL; }
    virtual wxBitmap GetSelectedBitmap() const { return wxNullBitmap; }

  protected:
    // implementation
    // --------------

    wxCoord XDEV2LOG( wxCoord x ) const {
      return DeviceToLogicalX( x );
    }
    wxCoord XDEV2LOGREL( wxCoord x ) const {
      return DeviceToLogicalXRel( x );
    }
    wxCoord YDEV2LOG( wxCoord y ) const {
      return DeviceToLogicalY( y );
    }
    wxCoord YDEV2LOGREL( wxCoord y ) const {
      return DeviceToLogicalYRel( y );
    }
    wxCoord XLOG2DEV( wxCoord x ) const {
      return LogicalToDeviceX( x );
    }
    wxCoord XLOG2DEVREL( wxCoord x ) const {
      return LogicalToDeviceXRel( x );
    }
    wxCoord YLOG2DEV( wxCoord y ) const {
      return LogicalToDeviceY( y );
    }
    wxCoord YLOG2DEVREL( wxCoord y ) const {
      return LogicalToDeviceYRel( y );
    }

    // base class pure virtuals implemented here
    virtual void DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height );
    virtual void DoGetSizeMM( int* width, int* height ) const;

  public:
    // GTK-specific member variables

    // not sure what for, but what is a mm on a screen you don't know the size
    // of?
    double       m_mm_to_pix_x,
                 m_mm_to_pix_y;

    bool         m_needComputeScaleX,
                 m_needComputeScaleY; // not yet used


  private:
    DECLARE_ABSTRACT_CLASS( wxDC )
};

// this must be defined when wxDC::Blit() honours the DC origian and needed to
// allow wxUniv code in univ/winuniv.cpp to work with versions of wxGTK
// 2.3.[23]
#ifndef wxHAS_WORKING_GTK_DC_BLIT
#define wxHAS_WORKING_GTK_DC_BLIT
#endif

#endif // __GTKDCH__
